A review is presented on the use of various activation analysis methods for the determination of trace elements in air particulate and related matters. A discussion is given on the contribution of such methods in solving the problem of air pollution in various parts of the world. This work is a part of a program undertaken by this Department for the evaluation of the various analytical techniques as investigative tools in pollution and other environmental studies.
A comparative study is presented on neutron activation analysis of rock and soil samples using whole reactor neutron spectrum
and epithermal neutrons with both relative and monostandard procedures. The latter procedure used with epithermal neutron
activation analysis of soil samples necessitated the use of the “effective resonance integrals” which were determined experimentally.
The incorporation of the β factor, representing deviation of reactor epithermal neutron flux from 1/E law, is developed in
the present work. The main criteria for the choice of one or more of the procedures studied for a given purpose are also indicated.
Analysis of 15 trace elements, Ca and Fe in the standard Japanese granite JC-1 using monostandard epithermal neutron activation
gave results in good agreement with the average literature values.